I found a tumblr which translates some parts of the other chapters
*SPOILER ALERT* [[Nimi: I have been waiting for you. It was truly a coincidence that I could take a picture of the moment when Oba-kun jumped off the building. But how about this? Don’t you think this is a perfect picture in terms of size and angle? This is my favourite among my collection.
Oba: Collection?!
Nimi: Yes, this is the best of them all. This is the moment a human behind ends his life. I even became speechless for a while. However, my desire increased even more. I want to see more portraits. Then I decided to send you a picture of Miyazaki torturing your son. I was dubious to whether you satisfied my expectations. Splendidly… you splendidly showed me what I expected. The moment that a person kills another person. Oba-san, you are amazing. You were certainly a monster. You transformed into a monster out of a tremendously outrageous feeling. But human’s desires cannot be used up. While I was observing the true nature of humans, I even had an illusion of me becoming a god. So more and more… The detectives didn’t understand the reason I sent a picture of the moment he jumped off. Of course they can’t. It’s because that will increase the possibility of you coming to me. The answer is very easy. I mean, I want to take a picture of a human that is trying to kill me. That would be the perfect piece for my finale.
Oba: A god?! You are a devil! A devil that enjoys manipulating human’s emotions.
Nimi: I’m so offended to hear that from you who has killed people. Got it? What I am doing is more like a highly artistic hobby. No law can judge me.
Oba: I’ve had enough of you. I want to ask you only one thing. Couldn’t you save Makoto before you took this picture?
no subject
Date: 2014-12-28 06:40 pm (UTC)*SPOILER ALERT*
[[Nimi: I have been waiting for you. It was truly a coincidence that I could take a picture of the moment when Oba-kun jumped off the building. But how about this? Don’t you think this is a perfect picture in terms of size and angle? This is my favourite among my collection.
Oba: Collection?!
Nimi: Yes, this is the best of them all. This is the moment a human behind ends his life. I even became speechless for a while. However, my desire increased even more. I want to see more portraits. Then I decided to send you a picture of Miyazaki torturing your son. I was dubious to whether you satisfied my expectations. Splendidly… you splendidly showed me what I expected. The moment that a person kills another person. Oba-san, you are amazing. You were certainly a monster. You transformed into a monster out of a tremendously outrageous feeling. But human’s desires cannot be used up. While I was observing the true nature of humans, I even had an illusion of me becoming a god. So more and more… The detectives didn’t understand the reason I sent a picture of the moment he jumped off. Of course they can’t. It’s because that will increase the possibility of you coming to me. The answer is very easy. I mean, I want to take a picture of a human that is trying to kill me. That would be the perfect piece for my finale.
Oba: A god?! You are a devil! A devil that enjoys manipulating human’s emotions.
Nimi: I’m so offended to hear that from you who has killed people. Got it? What I am doing is more like a highly artistic hobby. No law can judge me.
Oba: I’ve had enough of you. I want to ask you only one thing. Couldn’t you save Makoto before you took this picture?
Nimi: Possibly. Yes, yes. Be more angry! Haha, a partner who is trying to kill me is very great! Monster! ]]
source: http://mizaya.tumblr.com/post/25483913769/ningen-shikkaku-translation-final-confrontation
I do hate Nimi-sensei T_T